Snorkel mask



FIG. 1 is a perspective view of a snorkel mask showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a right side elevation view thereof; and,

FIG. 7 is a left side elevation view thereof.

The broken lines in the drawings showing the snorkel mask illustrate the portions of the snorkel mask that form no part of the claimed design. 

CLAIM The ornamental design for a snorkel mask, as shown and described. 